I can't say for sure that this will work on Android, but you could try to handle this by running two threads, making once context current on each at initialization, and synchronizing them so they do not attempt to draw at the same time (via a semaphore). That should avoid the eglMakeCurrent overhead, and synchronization should minimize pipeline stalls due to rendering from separate threads. Do not try to draw from both at the same time, as that will cause a great deal of slowdown.